Fieldbus surge protector RayDat SBH-3

modulargas discharge tubecommon mode

IEC/EN Category: D1/C1/C2/C3 Mode of Protection: Longitudinal, Transverse Coarse Protection: 3 Terminal GDT Voltages: 5, 12, 30 V DC Frequency Range: 30 MHz Surge Discharge Ratings: In: 10 kA, Imax: 20 kA, Iimp: 2.5 kA Series Load Current: 1 A Enclosure: DIN 43880 2/3 TE, DIN Rail Mount Terminals: Stranded to 4 mm2 Housing: Modular Design Compliance: IEC/EN 61643-21 UL 497B 4th Edition The RayDAT SBH-3 Series of surge protective devices has been developed to protect fieldbus systems (CAN Bus, Profibus DP, RS 232/V.24 m, RS 485, Sinec L2). It is intended for those applications where high ground potential rises may frequently occur, such as in locations close to electric railways. The circuit topology consists of a multi-stage protector providing both common (longitudinal) mode and differential (transverse) mode protection. Coarse protection is provided by a three-terminal gas discharge tube while fine protection is provided using a high-speed silicon avalanche diode or metal oxide varistor stage. Care is taken to ensure coordination between these two stages without voltage or surge current blind spots occurring. Thermal protection is provided to reduce the hazards of thermal runaway should there be an inadvertent mains incursion fault. Both common (longitudinal) mode and differential (transverse) mode protection is provided. If the module is unplugged out of the base, the connection lines remain enabled.